Valve device

Abstract

According to the valve device, the first elastic piece acts on the valve element assembly with the force facing the valve port, the first elastic piece acts on the lead screw assembly with the force away from the valve port, and therefore the thread teeth of the lead screw assembly can be tightly matched with the thread teeth of the valve element assembly; therefore, axial movement of the valve element assembly relative to the lead screw assembly can be reduced or avoided, and the precision of flow adjustment can be improved.

Description

Technical Field

[0001] The present application relates to the field of fluid control technology, and in particular to a valve device. Background Art

[0002] The valve device includes a screw rod and a valve core, which are connected to the valve core by transmission. The valve core can adjust the opening of the valve port, thereby adjusting the flow rate. The connection structure between the screw rod and the valve core can easily affect the accuracy of flow regulation. There is room for further improvement in the flow regulation accuracy of the valve device. Summary of the invention

[0003] The purpose of the present application is to provide a valve device that is conducive to improving the accuracy of flow regulation.

[0004] To achieve the above purpose, one embodiment of the present application adopts the following technical solution:

[0005] A valve device, wherein the valve component of the valve device includes a screw rod assembly, a valve core assembly and a first elastic member, the screw rod assembly is threadedly matched with the valve core assembly, the valve component has a valve port, and the valve core assembly can adjust the opening of the valve port, the screw rod assembly includes an abutment portion, the abutment portion is far away from the valve port relative to the valve core assembly, along the axial direction of the valve component, at least part of the first elastic member is located between the valve core assembly and the abutment portion, along the axial direction of the valve component, the first elastic member abuts against the valve core assembly; along the axial direction of the valve component, the first elastic member abuts against the abutment portion.

[0006] A valve device, wherein the valve component of the valve device includes a screw rod assembly, a valve core assembly and a first elastic member, the screw rod assembly is threadedly matched with the valve core assembly, the valve component has a valve port, and the valve core assembly can adjust the opening of the valve port, the valve device also includes an abutment portion, the abutment portion is away from the valve port relative to the valve core assembly, along the axial direction of the valve component, at least part of the first elastic member is located between the valve core assembly and the abutment portion, along the axial direction of the valve component, the first elastic member abuts against the valve core assembly; along the axial direction of the valve component, the first elastic member abuts against the abutment portion.

[0007] In the valve device provided in the embodiment of the present application, the first elastic member exerts a force on the valve core assembly toward the valve port, and the first elastic member exerts a force on the screw assembly away from the valve port, which is beneficial for the thread teeth of the screw assembly to fit tightly with the thread teeth of the valve core assembly, thereby helping to reduce or avoid axial movement of the valve core assembly relative to the screw assembly, and helping to improve the accuracy of flow regulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1It is a three-dimensional structural schematic diagram of an implementation mode of a valve component of the valve device of the present application;

[0009] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure at AA in the middle;

[0010] Figure 3 yes Figure 1 Schematic diagram of the cross-sectional structure at the middle BB;

[0011] Figure 4 yes Figure 1 A three-dimensional structural schematic diagram of a valve core assembly of the valve component shown;

[0012] Figure 5 yes Figure 1 A three-dimensional structural schematic diagram of a gasket of the valve component shown;

[0013] Figure 6 yes Figure 2 A schematic diagram of the local enlarged structure at C in the middle;

[0014] Figure 7 is a partially enlarged cross-sectional structural schematic diagram of a second embodiment of the valve device;

[0015] Figure 8 It is a cross-sectional structural schematic diagram of a third embodiment of the valve device. DETAILED DESCRIPTION

[0016] The following is combined with Figure 1-8 The present invention is further described with specific embodiments. In order to fully understand the present invention, many specific details are mentioned in the following detailed description. However, it should be understood by those skilled in the art that the specific components, devices and features illustrated in the drawings and described herein are merely exemplary and should not be considered as limiting.

[0017] The valve device can be applied to a vehicle thermal management system or an air conditioning system, and can be applied in particular to a circulation system in which CO2 is used as a refrigerant, wherein the vehicle thermal management system includes a new energy vehicle thermal management system, in which the valve device is often used as a throttling element or a switching element. The valve device includes a driving component and a valve component 1, wherein the driving component is located at the outer periphery of a portion of the valve component 1, and the driving component is fixedly connected or limitedly connected to the valve component 1. Furthermore, a sealing arrangement can be provided between the driving component and the valve component 1, which is beneficial to prevent water vapor or other impurities in the external environment from entering through the assembly gap between the driving component and the valve component 1, causing corrosion or failure inside the driving component. The driving component includes a stator assembly, which is located at the outer periphery of at least a portion of the valve component 1, and at least a portion of the stator assembly is specifically located at the outer periphery of the rotor assembly 50 of the valve component 1. The valve device is electrically connected and / or signal-connected to the outside world through the driving component.

[0018] refer to Figure 1 and Figure 2 , the valve component 1 includes a sleeve 51 and a valve seat assembly 10, the sleeve 51 and the valve seat assembly 10 are fixedly connected, the valve component 1 also includes a rotor assembly 50, a screw assembly 40 and a valve core assembly 20, the valve seat assembly 10 is located at the outer periphery of part of the valve core assembly 20, specifically, the valve seat assembly 10 has a first through hole 12, and part of the valve core assembly 20 is located at the first through hole 12; the valve seat assembly 10 has a valve port 11, and the valve core assembly 20 can adjust the opening of the valve port 11, and the opening range includes 0%-100%, when the opening is 0%, the valve core assembly 20 closes the valve port 11, and when the opening is 100%, the valve core assembly 20 completely opens the valve port 11; the sleeve 51 is sleeved on the outer periphery of the rotor assembly 50, the sleeve 51 is fixedly connected to the valve seat assembly 10, the rotor assembly 50 is fixedly connected or circumferentially limited to the screw assembly 40, and the screw assembly 40 is drivingly connected to the valve core assembly 20, specifically, refer to Figure 6 The screw assembly 40 is threadedly matched with the valve core assembly 20, and the valve component 1 includes a bearing 30, an outer ring 32 of the bearing 30 is fixedly connected to the valve seat assembly 10, and an inner ring 31 of the bearing 30 is fixedly connected or limit-connected to the screw assembly 40.

[0019] refer to Figure 2 When the rotor assembly 50 rotates circumferentially under the magnetic field excitation of the stator assembly, the rotor assembly 50 can drive the screw assembly 40 to rotate circumferentially, and the screw assembly 40 can drive the valve core assembly 20 to perform linear reciprocating motion along the axial direction of the valve component 1. When the valve component 1 is in the valve opening state, refer to Figure 2 , the valve core assembly 20 opens the valve port 11. The axial direction of the valve component 1 is as follows Figure 1-3 N direction as shown. The fixed connection in the text includes detachable and non-detachable connections. It can be understood that the transmission connection between the screw assembly 40 and the valve core assembly 20 may not be threaded, but axial limit fit, the valve device 1 includes a support nut 80, at least part of the support nut 80 is located in the sleeve 51, the support nut 80 is fixedly connected to the valve seat assembly 10, part of the screw assembly 40 is located in the support nut 80, the screw assembly 40 and the support nut 80 are threadedly matched, the rotor assembly 50 can drive the screw assembly 40 to rotate, and the screw assembly 40 moves along the axial direction of the valve component 1 under the action of the support nut 80, thereby driving the valve core assembly 20 to move along the axial direction of the valve component 1.

[0020] refer to Figure 2 and Figure 3The valve seat assembly 10 has a first flow hole 70 and a flow side hole 72. The first flow hole 70 can be communicated with the valve port 11, and the flow side hole 72 can be communicated with the valve port 11. When the opening of the valve port 11 is greater than 0%, the flow side hole 72 is communicated with the first flow hole 70; when the opening of the valve port 11 is 0%, the flow side hole 72 is relatively disconnected from the first flow hole 70; the valve component 1 has a first accommodating cavity 71. Along the axial direction of the valve component 1, the first flow hole 70 and the first accommodating cavity 71 are located on different sides of the valve core assembly 20. Specifically, the valve seat assembly 10 has a first through hole 12. At least part of the valve core assembly 20 is located in the first through hole 12. The first through hole 12 is The hole 12 forms at least part of the first accommodating chamber 71, and the valve core assembly 20, the valve seat assembly 10 and the bearing 30 form at least part of the wall of the first accommodating chamber 71; the valve core assembly 20 has a balancing channel 24, which is connected to the first accommodating chamber 71. When the valve component 1 is in a closed valve state, the valve core assembly 20 closes the valve port 11, the first flow hole 70 and the valve port 11 are relatively disconnected, and the balancing channel 24 is connected to the first flow hole 70. The fluid medium located in the first flow hole 70 can flow into the first accommodating chamber 71 through the balancing channel 24, which is conducive to eliminating or reducing the pressure difference on both sides of the axial direction of the valve core assembly 20, and is conducive to the operation balance of the valve core assembly 20. The valve component 1 includes a first sealing member 14. Along the radial direction of the valve core assembly 20, the valve core assembly 20 and the valve seat assembly 10 press the first sealing member 14, and the first sealing member 14 can prevent the fluid medium located in the first accommodating chamber 71 from flowing into the flow side hole 72 through the gap between the valve core assembly 20 and the valve seat assembly 10.

[0021] It can be understood that the valve component 1 has a rotor cavity 73, the sleeve 51, the valve seat assembly 10 and the bearing 30 form at least a portion of the wall of the rotor cavity 73, at least a portion of the rotor assembly 50 is located in the rotor cavity 73, and the valve seat assembly 10 may have a channel, and the channel of the valve seat assembly 10 connects the first accommodating cavity 71 and the rotor cavity 73, which is beneficial to eliminate or reduce the pressure difference on both sides of the axial direction of the bearing 30.

[0022] refer to Figure 2 The first sealing member 14 includes a sealing ring and a sealing ring. The sealing ring is located radially outside the sealing ring. Along the radial direction of the first sealing member 14, the sealing ring and the wall of the valve seat assembly 10 press the sealing ring tightly. The sealing ring contacts the valve core assembly 20. The sealing ring is specifically made of a plastic wear-resistant material, which is beneficial to reducing the friction and wear between the valve core assembly 20, and is beneficial to increasing the service life of the valve core assembly 20 and the first sealing member 14, and is beneficial to improving the sealing effect. It can be understood that at least part of the first sealing member 14 can be located in the groove of the valve core assembly 20 or in the groove of the valve seat assembly 10. Specifically, refer to Figure 2The valve seat assembly 10 has a first sealing groove, which opens toward the valve core assembly 20. At least part of the first sealing member 14 is located in the first sealing groove. Along the radial direction of the valve core assembly 20, the valve core assembly 20 and the wall forming the first sealing groove press the first sealing member 14. The valve seat assembly 10 forms part of the wall of the first sealing groove. Along the axial direction of the valve component 1, the valve seat assembly 10 and the first sealing member 14 are in contact or spaced. The valve seat assembly 10 can limit the axial displacement or displacement amount of the first sealing member 14, which is beneficial to improving the sealing stability of the first sealing member 14.

[0023] refer to Figure 2 and Figure 6 The screw assembly 40 is fixedly connected or limitedly connected to the inner ring 31 of the bearing 30. For details, refer to Figure 6 The screw assembly 40 includes an annular flange 42 and a connecting piece 43. Along the axial direction of the valve component 1, at least part of the inner ring 31 of the bearing 30 is located between the annular flange 42 and the connecting piece 43. The annular flange 42 and the connecting piece 43 clamp the inner ring 31 along the axial direction. At least part of the bearing 30 is located in the mounting hole section 13 of the valve seat assembly 10. The outer ring 32 of the bearing 30 is fixedly connected to the mounting hole section 13. The bearing 30 plays a role in supporting the screw assembly 40. The bearing 30 limits the axial displacement or displacement amount of the screw assembly 40. The external thread section 41 of the screw assembly 40 is threadedly matched with the valve core assembly 20, and the external thread section 41 is close to the valve core assembly 20 relative to the annular flange 42.

[0024] refer to Figure 3 and Figure 4 The valve core assembly 20 includes a plastic nut 21 and a metal valve core 22. The plastic nut 21 and the metal valve core 22 are fixed by injection molding or limitedly connected. The screw assembly 40 is threadedly matched with the plastic nut 21, which is beneficial to reducing the friction and wear of the threaded matching structure. For details, refer to Figure 3 and Figure 4The valve core assembly 20 includes a plastic nut 21, a metal valve core 22 and a pressing block 241. Along the axial direction of the valve component 1, at least a portion of the plastic nut 21 is located between the metal valve core 22 and the pressing block 241. The metal valve core 22 and the pressing block 241 are welded or riveted or interference fit or threadedly connected. The plastic nut 21 includes a radially protruding limiting portion 23. The valve seat assembly 10 has a limiting groove 13. The limiting groove 13 is extended along the axial direction of the valve component 1. At least a portion of the limiting portion 23 The limiting portion 23 is located in the limiting groove 13, and the limiting portion 23 can slide relative to the wall of the limiting groove 13 along the axial direction of the valve component 1. Along the circumference of the valve component 1, the wall of the limiting groove 13 can limit the circumferential rotation or rotation amount of the limiting portion 23, thereby limiting the circumferential rotation or rotation amount of the valve core assembly 20. By setting the limiting groove 13 and the limiting portion 23, the circumferential rotation or rotation amount of the valve core assembly 20 is limited, so that the screw assembly 40 can drive the valve core assembly 20 to move axially when it rotates. It can be understood that the axial direction of the valve core assembly 20 and the axial direction of the screw assembly 40 are both the axial direction of the valve component 1.

[0025] refer to Figure 2 and Figure 6 The valve component 1 includes a screw assembly 40, a valve core assembly 20 and a first elastic member 64. The screw assembly 40 is threadedly matched with the valve core assembly 20. The screw assembly 40 includes an abutment portion 60. Along the axial direction of the valve component 1, at least part of the first elastic member 64 is located between the valve core assembly 20 and the abutment portion 60. The first elastic member 64 is specifically a spring structure. Along the axial direction of the valve component 1, the first elastic member 64 abuts against the valve core assembly 20. Along the axial direction of the valve component 1, the first elastic member 64 abuts against the valve core assembly 20. Abutment; the first elastic member 64 exerts a force on the valve core assembly 20 toward the valve port 11, and the first elastic member 64 exerts a force on the screw assembly 40 away from the valve port 11, which is conducive to making the thread teeth of the screw assembly 40 and the thread teeth of the valve core assembly 20 closely match, thereby helping to reduce or avoid the axial movement of the valve core assembly 20 relative to the screw assembly 40, reducing the influence of the thread matching clearance between the screw assembly 40 and the valve core assembly 20 on the movement of the valve core assembly 20, and helping to improve the accuracy of flow regulation. It can be understood that when the valve component 1 is in the valve closing state, the valve core assembly 20 closes the valve port 11, and the first elastic member 64 can also exert a force on the valve core assembly 20 toward the valve port 11, thereby increasing the valve closing force, which is conducive to improving the sealing effect.

[0026] refer to Figure 2 and Figure 6 The valve component 1 includes a bearing 30 and a valve seat assembly 10, and the screw assembly 40 is fixedly connected or limitedly connected to the inner ring 31 of the bearing 30. For details, refer to Figure 6The screw assembly 40 includes an annular flange 42 and a connecting piece 43. Along the axial direction of the valve component 1, at least a portion of the inner ring 31 of the bearing 30 is located between the annular flange 42 and the connecting piece 43. The annular flange 42 and the connecting piece 43 clamp the inner ring 31 along the axial direction. At least a portion of the bearing 30 is located in the mounting hole section 13 of the valve seat assembly 10. The outer ring 32 of the bearing 30 is fixedly connected to the mounting hole section 13. The outer ring 32 of the bearing 30 and the mounting hole section 13 can be specifically interference fit or welded or riveted, etc. The bearing 30 plays a role in supporting the screw assembly 40. Specifically, the valve component 1 includes a fixing piece 53, which is fixedly connected to the valve seat assembly 10. Along the axial direction of the valve component 1, the fixing piece 53 abuts against the outer ring 32 of the bearing 30. The fixing piece 53 and the limiting step of the valve seat assembly 10 clamp the outer ring 32 of the bearing 30 along the axial direction, thereby limiting the axial displacement or displacement amount of the bearing 30. By providing the first elastic member 64, the first elastic member 64 exerts a force on the screw assembly 40 to move away from the valve port 11, which is conducive to the screw assembly 40 driving the inner ring 31 of the bearing 30 to move away from the valve port 11, eliminating or reducing the axial clearance between the inner ring 31 and the outer ring 32, which is conducive to reducing or avoiding the influence of the axial clearance between the inner ring 31 and the outer ring 32 on the movement of the valve core assembly 20, and reducing or avoiding the axial movement of the valve core assembly 20. It can be understood that the fixing member 53 can cooperate with the guide of the screw assembly 40, which is conducive to reducing the radial shaking of the screw assembly 40.

[0027] refer to Figure 2 and Figure 6 At least part of the first elastic member 64 is located in the first accommodating cavity 71, and the first elastic member 64 is located at the periphery of the screw assembly 40. The first elastic member 64 can also be a conical spring, a spring, etc. In order to reduce the wear between the first elastic member 64 and the screw assembly 40, a gasket can be provided between the first elastic member 64 and the screw assembly 40.

[0028] refer to Figure 6 The valve core assembly 20 includes a first support portion 241, at least part of which is located radially inside the first elastic member 64. Along the radial direction of the valve component 1, the first support portion 241 is in contact with or spaced from the first elastic member 64. The first support portion 241 can limit the radial offset or offset of the first elastic member 64, thereby facilitating the normal operation of the first elastic member 64. Specifically, the valve core assembly 20 includes a metal valve core 22 and a pressing block. The metal valve core 22 and the pressing block 241 clamp the plastic nut 21. The first support portion 241 is a pressing block. Along the axial direction of the valve component 1, the metal valve core 22 abuts against the first elastic member 64.

[0029] Understandable, reference Figure 7At least part of the first support portion 241 may also be located radially outside the first elastic member 64. Along the axial direction of the valve component 1, the first support portion 241 abuts against the first elastic member 64. The first support portion 241 can also limit the radial displacement or displacement of the first elastic member 64. The first support portion 241 may also be an integral structure with the metal valve core 22 and / or the plastic nut 21.

[0030] refer to Figure 6 The screw assembly 40 includes a screw and an abutment portion 60, which are separately arranged. Along the axial direction of the valve component 1, the abutment portion 60 abuts against the annular flange 42 of the screw assembly 40; along the axial direction of the valve component 1, the abutment portion 60 abuts against the first elastic member 64. By providing the abutment portion 60, it is helpful to reduce or avoid the rotation of the screw assembly 40 being transmitted to the first elastic member 64, thereby ensuring the normal operation of the first elastic member 64 and reducing the wear of the first elastic member 64. It can be understood that the abutment portion 60 can also be an integrated structure with the screw. The abutment portion 60 can also be a component such as a sliding bearing or a rolling bearing.

[0031] refer to Figure 5 and Figure 6The abutment portion 60 includes a first sub-portion 61, a second sub-portion 63 and a matching portion 62. The first sub-portion 61 and the second sub-portion 63 are located on different sides of the matching portion 62. The first sub-portion 61 is closer to the bearing 30 relative to the second sub-portion 63. At least part of the matching portion 62 is located on the radial outside of the annular flange 42. Along the radial direction of the valve component 1, the matching portion 62 is in contact with or has a gap with the annular flange 42. At least part of the matching portion 62 is located on the radial inside of the first elastic member 64. Along the radial direction of the valve component 1, the matching portion 62 is in contact with or has a gap with the first elastic member 64. The annular flange 42 can limit the radial displacement or displacement amount of the matching portion 62. The matching portion 62 can limit the radial displacement or displacement amount of the first elastic member 64, which is beneficial to ensure the normal operation of the first elastic member 64. The radial dimension of the first sub-portion 61 is greater than the radial dimension of the second sub-portion 63. By setting it along the axial direction of the valve component 1, the second sub-portion 63 abuts against the annular flange 42; along the axial direction of the valve component 1, the first sub-portion 61 abuts against the first elastic member 64; this is conducive to setting the radial dimension of the first elastic member 64 large enough, thereby facilitating the improvement of the elastic force of the first elastic member 64. On the other hand, along the axial direction of the valve component 1, the first sub-portion 61 is set close to the bearing 30 relative to the second sub-portion 63, which is conducive to setting the axial dimension of the first elastic member 64 large enough, thereby facilitating the improvement of the elastic force of the first elastic member 64. It can be understood that the first sub-portion 61, the matching portion 62 and the second sub-portion 63 are an integral structure, and the first sub-portion 61, the matching portion 62 and the second sub-portion 63 are specifically thin-walled structures, and the first sub-portion 61, the matching portion 62 and the second sub-portion 63 can be formed by stamping; the abutment portion 60 has a second through hole 66, and part of the screw rod assembly 40 is located in the second through hole 66, and along the radial direction of the valve component 1, the screw rod assembly 40 is in contact with the wall of the second through hole 66 or a gap is set.

[0032] In another embodiment, reference Figure 7 , the abutting portion 60 may not include a matching portion located on the outer periphery of the annular flange 42, the first sub-portion 61 and the second sub-portion 63 are an integral structure, along the axial direction of the valve component 1, the first sub-portion 61 abuts against the first elastic member 64; along the axial direction of the valve component 1, the second sub-portion 63 abuts against the annular flange 42, along the radial direction of the valve component 1, the second sub-portion 63 contacts or is provided with a gap with the screw assembly 40, at least part of the second sub-portion 63 is located radially inside the first elastic member 64, along the radial direction of the valve component 1, the second sub-portion 63 contacts or is provided with a gap with the first elastic member 64, the screw assembly 40 can limit the radial displacement or displacement amount of the second sub-portion 63, and the second sub-portion 63 can limit the radial displacement or displacement amount of the first elastic member 64, which is conducive to ensuring the normal operation of the first elastic member 64. It can be understood that along the axial direction of the valve component 1, the first sub-portion 61 can also abut against the annular flange 42.

[0033] refer to Figure 3 and Figure 5The abutment 60 includes a convex portion 65, at least part of which is located in the limiting groove 13 of the valve seat assembly 10, and the limiting groove 13 is arranged to extend along the axial direction of the valve component 1. Along the circumference of the valve component 1, the wall of the limiting groove 13 can limit the circumferential rotation or rotation amount of the convex portion 65, thereby limiting the circumferential rotation or rotation amount of the abutment 60, and the annular flange 42 of the screw assembly 40 can rotate circumferentially relative to the abutment 60. By setting the abutment 60 to include the convex portion 65, it is beneficial to limit the circumferential rotation or rotation amount of the abutment 60, thereby reducing or avoiding the rotation of the screw assembly 40 from being transmitted to the first elastic member 64, which is beneficial to reducing the wear of the first elastic member 64 and increasing the service life of the first elastic member 64.

[0034] It is understandable that the abutment portion 60 may not have the protrusion 65 , and the abutment portion 60 includes a recess, and the valve seat assembly 10 includes a circumferential limit portion, at least part of which is located in the recess, thereby limiting the circumferential rotation or rotation amount of the abutment portion 60 .

[0035] refer to Figure 8 In another embodiment of the valve device, the valve component 1 of the valve device includes a screw assembly 40, a valve core assembly 20 and a first elastic member 64. The screw assembly 40 is threadedly matched with the valve core assembly 20. The valve component 1 has a valve port 11, and the valve core assembly 20 can adjust the opening of the valve port 11. The valve device also includes an abutment portion 60. The abutment portion 60 is away from the valve port 11 relative to the valve core assembly 20. Along the axial direction of the valve component 1, at least a portion of the first elastic member 64 is located between the valve core assembly 20 and the abutment portion 60. Along the axial direction of the valve component 1, the first elastic member 64 abuts against the valve core assembly 20; along the axial direction of the valve component 1, the first elastic member 64 abuts against the abutment portion 60. The first elastic member 64 exerts a force on the valve core assembly 20 toward the valve port 11, and exerts a force on the screw assembly 40 away from the valve port 11, which is conducive to making the thread teeth of the screw assembly 40 and the thread teeth of the valve core assembly 20 fit tightly, thereby helping to reduce or avoid the axial movement of the valve core assembly 20 relative to the screw assembly 40, reducing the influence of the thread matching clearance between the screw assembly 40 and the valve core assembly 20 on the movement of the valve core assembly 20, and helping to improve the accuracy of flow regulation. It can be understood that when the valve component 1 is in the valve closing state, the valve core assembly 20 closes the valve port 11, and the first elastic member 64 can also exert a force on the valve core assembly 20 toward the valve port 11, thereby increasing the valve closing force, which is conducive to improving the sealing effect.

[0036] refer to Figure 8In this embodiment, the valve component 1 also includes a valve seat assembly 10 and a bearing 30. The valve seat assembly 10 has a step portion 101, and the abutment portion 60 is pressed between the bearing 30 and the bottom surface of the step portion 101. The valve component 1 includes a fixing member 53, and the fixing member 53 is fixedly connected to the valve seat assembly 10, and the fixing method includes welding, riveting, etc. Along the axial direction of the valve component 1, the fixing member 53 abuts against the outer ring 32 of the bearing 30, and the fixing member 53 and the abutment portion 60 clamp the outer ring 32 of the bearing 30 along the axial direction, thereby limiting the axial displacement or displacement amount of the bearing 30, and also fixing the abutment portion to the step portion 10 of the valve seat assembly 10. In this embodiment, other structures can refer to the above-mentioned embodiments, which will not be repeated here.

[0037] Alternatively, in other embodiments, the abutment portion 60 is separately provided from the screw assembly 40, and the abutment portion 60 abuts axially against the annular flange 42 of the screw assembly 40; or the abutment portion 60 and the screw assembly 40 are an integral structure, and the abutment portion 60 is circumferentially protruded relative to the main body of the screw assembly 40.

[0038] It should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail in this specification with reference to the above embodiments, it should be understood by those skilled in the art that the present invention can still be modified or replaced by equivalents, and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A valve device, wherein a valve component of the valve device comprises a screw rod assembly, a valve core assembly and a first elastic member, the screw rod assembly is threadedly matched with the valve core assembly, the valve component has a valve port, the valve core assembly can adjust the opening of the valve port, the screw rod assembly comprises an abutment portion, the abutment portion is far away from the valve port relative to the valve core assembly, along the axial direction of the valve component, at least a part of the first elastic member is located between the valve core assembly and the abutment portion, along the axial direction of the valve component, the first elastic member abuts against the valve core assembly; along the axial direction of the valve component, the first elastic member abuts against the abutment portion.

2. The valve device according to claim 1, characterized in that: The first elastic member includes a spring and a reed, and at least a portion of the first elastic member is located in the first accommodating cavity.

3. The valve device according to claim 2, characterized in that: The valve core assembly includes a first support portion, at least a portion of which is located radially inward or radially outward of the first elastic member, and the first support portion is in contact with or spaced from the first elastic member.

4. The valve device according to any one of claims 1 to 3, characterized in that: The valve core assembly further comprises a metal valve core, the metal valve core is in axial contact with the first elastic member, the metal valve core and the first supporting portion clamp a plastic nut, and the plastic nut is threadably matched with the screw assembly.

5. The valve device according to claim 4, characterized in that: The abutment portion is separately provided from the screw assembly, and the abutment portion abuts against the annular flange of the screw assembly along the axial direction.

6. The valve device according to claim 5, characterized in that: The abutment portion includes a first sub-portion, a matching portion and a second sub-portion, wherein the first sub-portion and the second sub-portion are located on different sides of the matching portion, the first sub-portion abuts against the first elastic member axially, the second sub-portion abuts against the annular flange axially, and the matching portion is in radial contact or gap arrangement with the annular flange.

7. The valve device according to claim 5, characterized in that: The abutting portion includes a convex portion, at least a portion of which is located in the limiting groove, and along the circumference of the valve component, the convex portion is in contact with or spaced from the wall of the limiting groove.

8. The valve device according to any one of claims 1 to 7, characterized in that: The valve seat assembly is fixedly connected to the bearing, the screw assembly is connected to the bearing, the screw assembly is fixedly connected to the rotor assembly, and the valve core assembly can adjust the opening of the valve port.

9. A valve device, characterized in that: The valve component of the valve device includes a screw rod assembly, a valve core assembly and a first elastic member. The screw rod assembly is threadedly matched with the valve core assembly. The valve component has a valve port, and the valve core assembly can adjust the opening of the valve port. The valve device also includes an abutment portion, which is away from the valve port relative to the valve core assembly. Along the axial direction of the valve component, at least part of the first elastic member is located between the valve core assembly and the abutment portion. Along the axial direction of the valve component, the first elastic member abuts against the valve core assembly; along the axial direction of the valve component, the first elastic member abuts against the abutment portion.

10. The valve device according to claim 9, characterized in that The abutment portion is separately arranged from the screw assembly, and the abutment portion abuts against the annular flange of the screw assembly along the axial direction; or the abutment portion and the screw assembly are an integral structure, and the abutment portion is circumferentially protruded relative to the main body of the screw assembly; or the valve component also includes a valve seat assembly and a bearing, and the valve seat assembly has a step portion, and the abutment portion is pressed between the bearing and the bottom surface of the step portion.

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